Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape
One Time Password Authentication package, compatible with Google Auth
Identity infrastructure, simplified for you
MaxKey SSO ,Leading-Edge IAM-IDaas(Identity and Access Management)
Leapp is the DevTool to access your cloud
A SAML SSO service designed as an OAuth 2.0 or OpenID Connect flow
OpenID Connect and OAuth 2.0 Framework for ASP.NET Core
Facebook authentication strategy for Passport and Node.js.
Two-factor authentication for Node.js